Malicious PDF — malware analysis report

Static analysis result for SHA-256 86d1abd2d2032f43…

MALICIOUS

PDF

50.2 KB Created: 2020-08-15 05:46:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8027affd1d747cc6f91f4257c2702600 SHA-1: 0c96f42290ca37a554620dc4eda9bb242f16bed1 SHA-256: 86d1abd2d2032f4370b59a7e70c8b69df8ac14dc3a555f83b2d6ae305b574845
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded links, with one specifically identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates a direct link to malicious infrastructure, and 'PDF_SEO_LINK_FARM' suggests a large number of external links, likely for SEO poisoning or to distribute malware. The document body, though heavily obfuscated, contains the same URL found in the malicious redirector heuristic, reinforcing the malicious intent.

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/wb?keyword=eo%20on%20contractualization%20pdf
    • http://files.appwesley.org/uploads/1/3/2/6/132681488/e7cf2cb3190c.pdf
    • http://files.saintpaulcatholicchurchpocahontas.com/uploads/1/3/2/7/132740865/9848483.pdf
    • https://cdn.shopify.com/s/files/1/0428/9665/4499/files/febuj.pdf
    • https://cdn.shopify.com/s/files/1/0440/3609/6150/files/36534984401.pdf
    • https://cdn.shopify.com/s/files/1/0433/8316/0995/files/91914187724.pdf
    • https://cdn.shopify.com/s/files/1/0430/1602/8309/files/9277219317.pdf
    • https://cdn.shopify.com/s/files/1/0429/5986/3961/files/zafugonaneziferizidimel.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/19189676900.pdf
    • https://cdn.shopify.com/s/files/1/0432/3121/5774/files/vukekegegij.pdf
    • https://cdn.shopify.com/s/files/1/0429/9603/9839/files/kusixigozarumanavagolevip.pdf
    • https://cdn.shopify.com/s/files/1/0429/5317/9289/files/zibulivazatuwun.pdf
    • https://cdn.shopify.com/s/files/1/0428/6991/5814/files/vatuxikamuzajura.pdf
    • https://cdn.shopify.com/s/files/1/0429/3564/8409/files/69784340685.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007acd.bin
4c94e9d2122cf955a51bc9d4b419acdd36179989eb2ae071c4c8100f83e8e1f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ACD 4744 bytes
font_01_sfnt_off00008af2.bin
64b03c4bac72fd046e61f02e75358c3bd9fbc5f2cb1c9a007ff7c15233f4a607		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AF2 10304 bytes
font_02_sfnt_off0000ae24.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE24 4324 bytes

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